Hmm I think you can choose the DELL Vostro 1400 or 1500 if you are not looking for flashy looks and colours or if you need them then go for the Inspiron 1420 or 1520...
1400/1420 is a better choice since it will be very portable and also a lil cheaper than 15" laptops.... Upgrade to a Geforce 8400GS card in your laptop and get 2 GB of ram.... This will come around 51k I presume for the 1420 and around 50k for the 1400...
DELL dont bother about sony its expensive and hp just sucks
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Seagate 500gb 7200RPM l Corsair 2*1GB Ram 800mhz l XFX 8800 GTS 320MB Xtreme 650/ 1500/ 950 l Asus P5N-eSLI l Core 2 Duo e6750 l Coolermaster Extreme Power 600watts SMPS l Microtek 800VA Ups l